sewrey



2 Sheets-Sheet 1.

(No Model.)

H. SEWREY.

ROTARY ENGINE.

Patented June 30, 1885.

Wzlficasses.

I fid w/wi 64w Mum (No Model.) 2 Sheets-Sheet 2.

H. SEWREY.

ROTARY ENGINE.

No. 321,254. Patented June 30, 1885.

A I h z T H. K It I 1' flaw i "siren STATES HENRY SEWVREY, OF BARBIE, ONTARIO, CANADA.

SPECIFICATION forming part oflLettersPatent'No. 321,254, dated June'SO, 1885.

=Application file'll'February 24, 1885.

T0 (ZZZ whom it may concern:

Beit known that'I, HENRY Sewn-Each the town of Barrie, in the-county-of' Simcoe, in the "Province of Ontario, Canada, engineer, have-invented certain new and useful Improve ments in Rotary Engines; andI'do-hereby dc clarethat the following is-afull, clear, andexactdescription of the same.

The invention relates'to rotary engines; and the novelty consists in the peculiar combinations and the construction and arrangement of parts, hereinafter more fully described and claimed.

Figure 1 is aperspective outsideview of my improved rotary engine. Fig. 2is a view of my improved rotary engine with the front coveroff the cylinder. Fig. 3 is a cross-section through a b. Fig. 4 is a front section through my. Fig. 5 is a sectional detail showing thebearing-box of the cylindrical dividing-block. Fig. 6 is an enlarged perspective detailof the cut-off valve.

In the drawings, like letters of reference indicate corresponding parts in each figure.

Ais the cylinder; B, the front cover; 0, the back cover; D, the piston, and E the wings held within recesses in the piston D, fitted against the inner circumference of the'cylinder, and against the inner face of the front cover, B, and the inner face of the adjustable plate F, which is next to the back cover, 0, and is adjusted by the set-screwsG, so that any wear can readily be taken up in order to maintain steam-tight joints on both faces of the piston D and its wings E.

H are cylindrical blocks located opposite to each other within chambers formed in the cylinder A. These I term dividing-blocks, as they form a division in the cylinder. A semicircular recess is formed in each block H, so as to allow the wings Eto pass the blocks when the piston is revolving. It will be understood that the blocks H revolve so as to create as little friction as possible in their contact with the piston D, and also in order to permit the wings E to pass the blocks H during the revolving of the piston D. In order to insure regularity in the revolving of the blocks H, I provide gearing shown in dotted lines in Fig. 1, by which motion from the shaft I of the piston is conveyed to the spindles J of the blocks H, the said blocks being driven by this gearingso that the-recess d in each block shall come opposite to-the interior of the cylinder A-at the'moment when the-wings E arrive at theblocks'H, which blocks resume'their connection with the piston D the moment after the wings have passed.

Kare rolling cut-off'valves, held in suitable steam-chests located on opposite sides of the cylinder A, and communicating with its interior bythe steanrports e, which steam-ports enter'theoylinder next to the blocks-H on the under side of-oneand the upper side of the other, the steam entering the chests of the valves K through the steam-pipes L, and passing"through theportf,madein the center of each of the'said valves. These valves are op erated from an eccentric, M, placed on tho shaftL-as indicatedlin Fig. 1, which,throu gh the connection exhibited inFig. 1, impartsa rocking movement to the valves K, soithat theport fin each .valve passes and repasses its respective steam-port 6, thereby alternately admitting and cutting OK the supply of steam admitted into the cylinder A through the ports e, the valve-gear being designed to effect the cut-off at any desired point in the revolution of the piston D, so that the said piston shall be propelled by the expansion of the steam.

As any skilled mechanic would understand how to set the valve-gear to effect the desired purpose, it is not necessary for me to describe the construction and manipulation of the valve-gear in question, as the foregoing description and accompanying drawings will be sufficient.

I have now referred to all the principal parts of my improved rotary engine; but before summing up the points of my invention, I will first draw attention to one or two minor features of construction.

It will be noticed that the cylindrical blocks H do not fit tightly entirely round the surface of the chambers in which they are held, but that a small space, 9, extends from the steam-port 6 partially around the block. This space 9 admits sufficient steam behind the blocks H to press the opposite side of each against the circumference of the piston D, in order to insure a practically steam-tight connection between the blocksrand the piston." I should also mention here that the spindles J of these blocks H are carried in adjustable bearing-boxes N, (see Fig. 5,) which bearingboXes are each adjusted by means of the setscrew 0. 7

On the back side of each wing E, I usually place a block, h, so as to reduce the size of the steam-space during the period that the wing is passing the recess (1. It will also be noticed that the cylindrical blocks H are hollowed out, which is generally done for the purpose of lightening the side opposite to the recess in order to balance the'block.

On reference to Fig. 4 the operation of my rotary engine will be understood. The piston is supposed to be traveling in the direction indicated by arrow, and the wings E have just passed the block H, which are thus revolving in the direction indicated by their arrows, The ports 0 and f are now opposite to each other, and consequently the steam is being admitted into the cylinder A behind the back of each wing E, the blocks H forming cutoffs or dividers, to prevent the steam admitted at the back of one wing finding its way in front of the other wing, the space in front of each wing E being emptied of steam through the exhaust-ports P, which are constantly open, and communicate with the interior of the cylinder on the side of each block H opposite to that at which the steam-ports 0 enter; conse quently as the wings reach the blocks H they pass by the exhaust-ports 1?, and the old steam is allowed to escape before the new steam is admitted.

It will be understood that by admitting and cutting off the steam on two opposite sides simultaneously the revolving pistonis completely balanced at all points of its revolution, thus reducing to a minimum the liability of the parts to wear.

WVhat I claim as my invention is- 1. In a rotary engine in which steam is admitted from opposite sides and the piston has opposite wings, as described, the cylinder A, having semi-cylindrical recesses to receive the dividing -blocks, and steam-inlet ports opening into such recesses, combined with the dividing-blocks and piston, and with eX- haust-ports, as set forth.

2. The cylinder A, having recesses to receir e the dividing-blocks, arranged upon opposite sides of the cylinder, the steam-inlet ports e,entering such recesses, above upon one side and below upon the other, in combination with the dividingblocks II, having re cesses d, the piston D, having wings E, and

exhaust-ports P, as set forth.

3. In a rotary engine, as described, the dividingblocks H, having their shafts journaled in movable bearings N, and means, as O, for adjusting said bearings, as and for the purposes set forth.

4. In a rotary engine in which the steam is admitted within the recess which receives the dividing-blocks, the blocks H, having recesses d, and cut away as shown, combined and arranged with the cylinder to leave steam-space within the recess and adjacent to the steaminlet, as set fort-h.

Barrie, Ontario, February 7, 1885.

v H. SE\VREY. In presence of- \V. L. MORTON,

G120. W. LOUNT. 

